Printer&#39;s blanket.



J. S. HEALY.

PRINTERS BLANKET.

APPLICATION FILED NOV.'H, 1913.

1,147,942. Patented July 27, 1915.

.i er

1 Planar FFICE.

JOHN S. HEALY, OF NEW YORK, N. Y., ASSIGNOR TO GEORGE It. WILLSON, OF NEW YORK, N. Y.

' I PRINTERS BLANKET.

To all whom it may concern Be it known that I, JOHN S. HEALY, a citizen of the United States, and a resident of the borough of Brooklyn, city of New York, county of Kings, State of New York, have made certain new and useful Improvements in Printers Blankets,'of which the following is a specification.

The invention relates to printers blankets and methods of making the same, and has for an object to provide an improved construction of the character referredto which shall be highly efiicient and economical in operation.

Other objects of the invention will be apparent from the following description.

The invention consists in the novel methods, improvements, features of construction, and combinations of elements hereinafter more fully set forth.

In the accompanying drawings, which is referred to herein and forms a part hereof, is-illustrated an embodiment of a feature of the invention, the same serving in connection with the description more fully to explain the invention.

The drawing is a perspective view of a portion of a printer's blanket; constructed in accordance with the invention and the proportions are distorted in order better to show the construction. Referring now in detail to the drawing, there is illustrated a preferred embodiment of the invention made in accordance with one feature thereof. This comprises a body of yielding material which may be made of various materials and in different ways. Preferably, a composition is made having elasticity and at the same time being impervious to oil. The preferred composition includes glue; glycerine, which prevents hardening of the glue and forms therewith an elastic compound and one that is not injuriously affected by the ingredients commonly used in printers ink. T 0 these are added gum arabic and china clay which add body to the composition and prevent undue softening by heat; and a small quantity of antiseptic, as formaldehyde, will be useful. While these materials may be mixed in various proportions, the preferred composition includes four parts glue. five parts glycerin, one-half part gum arabic, and one-half part china clay. To this preferably is added a sixty-fourtlrpart of formaldehyde.

Specification of Letters Patent.

Patented July 24?, 19115.

In the best embodiment of the invention a fabric l, as flannel, having a nap on both sides, is impregnated with this composition, and to this impregnated fabric is attached on each side a suitable fabric 2 without a nap, as muslin, the composition fuming a layer 3 between each two strips of fabric.

According to another feature of the invention, on the member thus produced there is superposed in operation another member 4: of yielding material. This-member may be made of various materials. It has been found, for example, that for certain kinds of work a sheet of the cloth known as tympan? may be used, in which case the composition member is made thicker than would ordinarily be the case. It will be noted that the composition member may be made of any desired thickness by varying the number of layers of impregnated fabric or the amount of composition used. hen a tympan'sheet has been used. it may be lifted from the composition member and replaced with another sheet. desired. On other kinds of work a strip of felt may be superposed, upon the first or composition member, and, whilethe lt member will become attached to the rst member because of its texture and of the heat and friction due to operation of the press, yet it maybe detached from the first member, when desired. Moleskin, for example. may also be used.

The preferred method -o f making the printers blanket of the invention is as follows: A composition is made of the desired ingredients, the desired fluidity being obtained by adding water, assay three parts to the specific mixture described. In a suitable vessel containing thecomposition is laid the fabric with the nap on one or both sides and the fabric is thoroughly preg. nated with the composition. It is then removed and placed between two sheets of fabric, as muslin, and the three sheets are pressed between rollers or in a press. Upon said member there is preferably superposed in operation a sheet of yielding material, as fabric.

A printers blanket, constructed in accordance with the invention will be "ery durable and economical in operation and at'the same time highly efficient, and will possess many other advantages which will be apparent to those skilled in the art.

The invention in its broader aspects is I not limited to the precise constructions or prbportions of parts shown and described nor to any particular constructions by w hich'the same has been or may be carried into effect nor to the precise steps or sequence of steps in the method of making the same which has been described, as many changes may be made in details Without departing from the main principles of the invention or sacrificing its chief advantages.

I claim: 1. A printers blanket comprising a body of yielding material impregnated with a compound including four parts glue, five parts glycerin, and one-half part china clay.

2. A printers blanket comprising a body of yielding material impregnated with a compound including four parts glue, five parts glycerin, one-half part gum arabic, and one-half part china clay.

3. A printers blanket comprising a body of yieldingmaterial impregnated with a woven fabric, and with which the felt,

muslin and woven fabric adhere.

6. A printers blanket including a glutinous, fabric-impregnating compound indissoluble in oil and including glycerized glue,

ing said nap-carryingelement and gum arabic, and china clay, a layer of felt on one side of and adhering to said com-- pound, and a layer of adhering Woven fab ric on the opposite side thereof.

7. A printers blanket including a nap carrying element, a Woven fabric, and an interposed oil-resisting compound including glycerized glue and china clay impregnatadhering to theivoven fabric. a

8. A printers blanket including a layer of nap-carrying fabric, a sheet of woven fabric, and an interposed oil-resisting, feltimpregnatingcompound comprising glue,

' glycerin, gum ara-bic and china clay.

9. A printers blanket including a layer of felt, a sheet of Woven fabric, and an interposed oil-resisting, felt-impregnating compound comprising glue, glycerin, gum a-rabic, china clay and formaldehyde.

10. A printers blanket'including a layer of felt impregnated with an oil-resisting compound comprising four parts of glue, five parts of glycerin, a one-half part gum arabic, and a onehalf part china-clay, and a layer of woven fabric adheriifg to said compound. v,

11. A printers blanket including a layer of felt, a layer of muslin, a layer of flannel, and layers of a glutinous, fabric-impregnat ng compound indissoluble in oil and interposed between the felt and muslin and between the muslin and flannel, respectively, and with which felt, muslin and flannel the compound adheres.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing Witnesses.

JOHN S. HEALY.

Witnesses:-

GEORGE PALMER, GEO. L. ,WILLSON.

flopiea of this patent may be obtained for five cents each, by addressing the Uommissioner of Patents,

lli'eshington, D. G. 

